import java.util.Scanner;

public class demo2 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while (scan.hasNext()) {
            double num1 = scan.nextDouble();
            double num2 = scan.nextDouble();
            double num3 = scan.nextDouble();
            double max = Math.max(num1, Math.max(num2, num3));
            if (max == num1) {
                if (num2 + num3 > num1) {
                    System.out.println("Yes");
                } else {
                    System.out.println("No");
                }
            } else  if (max == num2) {
                if (num1 + num3 > num2) {
                    System.out.println("Yes");
                } else {
                    System.out.println("No");
                }
            } else  if (max == num3) {
                if (num1 + num2 > num3) {
                    System.out.println("Yes");
                } else {
                    System.out.println("No");
                }
            }
        }
    }
}
